CN102221758A - Alignment method for hybrid vertical photoalignment liquid crystal display device - Google Patents
Alignment method for hybrid vertical photoalignment liquid crystal display device Download PDFInfo
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- CN102221758A CN102221758A CN 201110200964 CN201110200964A CN102221758A CN 102221758 A CN102221758 A CN 102221758A CN 201110200964 CN201110200964 CN 201110200964 CN 201110200964 A CN201110200964 A CN 201110200964A CN 102221758 A CN102221758 A CN 102221758A
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Abstract
The invention provides an alignment method for a hybrid vertical photoalignment liquid crystal display device. In the vertical photoalignment liquid crystal device, ultraviolet lights from different angles simultaneously irradiate on multiple regions of at least an alignment film on a first substrate and a second substrate, and an alignment is carried out, the side chain of the alignment film of each region forms an angle corresponding to the ultraviolet light irradiation angle. In the invention, the inclination angles of part liquid crystal molecules in an initial state within the same region are lesser or vertical to the surface of the substrates, the brightness is much lower in a dark state, thus the contrast ratio of the liquid crystal panel can be improved; the voltage of the liquid crystal panels within the same region is increased and then the inclination angles of the liquid crystal molecules are different, thus the parallax error of the liquid crystal panel can be improved; the response speed of the liquid crystal panel upon startup can be promoted by an overdrive mode; as for the reversing speed of the liquid crystal falling edge, since part liquid crystal molecules in the invention are vertically aligned or have lesser angles, the pullback strength is larger than that of the liquid crystal molecules in normal inclination, thus the response speed of the liquid crystal panel can be accelerated.
Description
Technical field
The present invention relates to the manufacture method of liquid crystal panel, especially display device of improving and preparation method thereof, specifically a kind of alignment method that mixes vertical light orientation liquid crystal indicator are passed through in the image viewing area.
Background technology
At present, to the LCD of MVA pattern, the liquid crystal that is adopted is a negative type liquid crystal.Liquid crystal molecule is orientated deflection later on applying voltage, and the LCD of common MVA pattern is generally in the structure that has adopted ditch groove on protrusion (bulge-structure) or the ITO slit(pixel electrode on CF substrate and the TFT substrate) structure.The effect of VA type alignment film presents near the direction perpendicular to panel surface liquid crystal molecule and arranges under not alive situation, arrange perpendicular to the bulge-structure surface around bulge-structure.And add after the voltage when the both sides of liquid crystal layer, the orientation of liquid crystal molecule deflects, just can control the orientation deflection angle of liquid crystal molecule by the voltage of control liquid crystal layer both sides, thereby realize modulation to the power of transmitted light, in common MVA pattern, bulge-structure is exactly to have specified a direction that turns to for liquid crystal molecule, and avoids liquid crystal molecule rambling turning to after applying voltage.
The UV2A technology that Sharp proposes is the once lifting to common MVA technology, has improved the aperture opening ratio of MVA sub-pixel greatly, response speed, specifications such as contrast.Its method for making is the alignment film that coating has light orientation function on array base palte and color membrane substrates, again by specific ultraviolet light equipment and MASK, in the subpixel area of TFT substrate and color membrane substrates, carry out 2 rightabout irradiations respectively, make this both direction become the tilt angle of liquid crystal molecule.By TFT substrate and color membrane substrates are fit together, just sub-pixel has been divided into 4 specific regions, but has applied after the voltage again, liquid crystal molecule just carries out turning on 4 directions in these 4 specific regions.
The effect of light alignment film is exactly to have substituted projection or groove structure before, and the light leak that projection and groove structure cause before having avoided has improved aperture opening ratio greatly, and made the liquid crystal molecule on sub-pixel surface that initial tilt angle all be arranged, and accelerates response speed.
The FPA technology that proposes before the Sony, be after liquid crystal panel is fitted, add lower voltage, general 0.8V, by UV-irradiation, make the alignment film sclerosis, because of the state sclerosis of alignment film main chain to tilt to specific direction, therefore under the state that does not apply voltage, promptly can give the liquid crystal molecule tilt angle.After this liquid crystal panel applied voltage, liquid crystal molecule can begin to tilt simultaneously, can realize the high-speed response of liquid crystal molecule thus.The advantage of FPA is than PSVA and UV2A technology better reliability level to be arranged.And the Hybrid FPA of the up-to-date proposition of Sony, only use the alignment film of giving tilt angle in a side of liquid crystal panel, the former FPA that all is equipped with the alignment film of having given tilt angle with both sides compares, and the response speed of liquid crystal molecule was faster when voltage was closed, and improves the response speed of liquid crystal panel with this.
In the ultraviolet alignment technique of Sharp, ultraviolet emission device shines ultraviolet ray on the MASK by light path, the last design of mask has the light leak zone, array base palte or color membrane substrates move in equipment, UV light passes through the light leak area illumination of mask to alignment film, make alignment film on the substrate form the irradiation area of 1 rule, be generally two kinds of directions opposite, apart from one another by flagpole pattern, every width is 1/2 of a sub-pixel.
Yet, to compare with the Hybrid FPA technology of Sony based on the light alignment technique of Sharp, the contrast of product and response speed are all slightly inadequate, in the product that can not be widely used in response speed is had higher requirements.
Summary of the invention
It is single to the objective of the invention is to compare the orientation angle at existing smooth orientation liquid crystal indicator and leading light alignment apparatus, the problem that the aberration of display device is big, contrast is not high, response speed is fast inadequately, a kind of utilization under the prerequisite of existing equipment proposed, make liquid crystal molecule can reach the technical method of multi-angle orientation, to improve the display quality of product.
Technical scheme of the present invention is:
(a), on first substrate and second substrate, be coated with the first substrate alignment film and the second substrate alignment film respectively;
(b), the ultraviolet light that adopts different angles is simultaneously to a plurality of area illumination of at least one alignment film, carries out orientation, the side chain of alignment film forms and the corresponding angle of UV-irradiation angle in each zone; And liquid crystal is tilted according to this side chain.
The angular range of UV-irradiation of the present invention is 88 degree-90 degree, and the side chain angular range of alignment film is 88 degree-90 degree.
The scope of ultraviolet light of the present invention is 100-200nm, and exposure is 10-200mJ/ cm2, and the time is 10-50sec.
A plurality of zones on the alignment film of the present invention are strip or bulk, interval or continuous.
Among the present invention, carry out the multi-angle orientation of two alignment films simultaneously or only on an alignment film, carry out the multi-angle orientation.
The generation device of the ultraviolet light of different angles of the present invention comprises mask plate mask and prism group, and mask is provided with a plurality of breach that are used for logical light, and mask places the top of alignment film, and the prism group places the both sides up and down of mask.
The production method of the ultraviolet light of different angles of the present invention is: UV-irradiation prism group, after the incident direction of change light produces the ultraviolet light of different angles, inject alignment film by the breach on the mask.
The prismatic refraction rate of prism group of the present invention is greater than 1.2.
Beneficial effect of the present invention:
The present invention makes it can form side chain on the direction of illumination with the UV-irradiation alignment film after first substrate and the second base plate coating alignment film, and liquid crystal is tilted according to this side chain.The present invention makes the direction of side chain formation more than 2 on the alignment film, specifically as shown in Figure 4 when a UV-irradiation alignment film.Make liquid crystal molecule in a zonule, form a plurality of directions, after liquid crystal panel applies voltage, having the liquid crystal molecule of vergence direction to drive in this zone does not have the liquid crystal molecule of vergence direction to tilt together, with UV2A pattern ratio before, mode can be brought following some benefit thus: 1, in the same zone under the original state some liquid crystal molecules tilt angle less or perpendicular to substrate surface, briliancy during dark attitude can be lower, and the contrast of liquid crystal panel gets a promotion; 2, in the same zone after the liquid crystal panel making alive, the angle of inclination difference of liquid crystal molecule has improvement to the parallax of liquid crystal panel; 3, the response speed the during startup of liquid crystal panel can promote by the overdrive mode, the reverse speed of liquid crystal negative edge, because part liquid crystal molecule of the present invention is that vertical orientation or pitch angle are less, so it is big that the strength that retracts is compared the liquid crystal molecule of normal inclination, so generally speaking can accelerate the response speed of liquid crystal panel.
Description of drawings
Fig. 1 is the synoptic diagram on the ultraviolet ray irradiation alignment film;
Ultraviolet ray is radiated on the alignment film, is interrupted perpendicular to the side chain on the alignment film of incident light, and the side chain that is parallel to incident light exists.
Fig. 2 is the synoptic diagram that ultraviolet ray shines different alignment zone on the alignment film;
Alignment film on the substrate is according to opposite alignment direction, approximate can regard as apart from one another by striped.
Fig. 3 is a UV2A pattern sub-pixel sectional view;
Under the original state liquid crystal molecule substrate surface according to alignment film on the direction of side chain arrange.
Fig. 4 is a pattern sub-pixel sectional view of the present invention;
Liquid crystal molecule has the vertical or less substrate surface that favours of part liquid crystal molecule at substrate surface orientation synoptic diagram under the original state of the present invention, effectively reduces dark attitude light leak.
Fig. 5 is the synoptic diagram in different alignment zone after ultraviolet ray of the present invention shines on the alignment film;
Alignment film on the substrate forms different orientations according to direction of illumination, can be two kinds, also can be more than 2 kinds, in the scope of 1/2 sub-pixel, can repeat also can distinguish difference.Dotted line represents that the angle of alignment direction and straight line is different.
Fig. 6 is a pattern sub-pixel sectional view of the present invention;
Liquid crystal molecule is at substrate surface orientation synoptic diagram under the making alive state of the present invention, and the twisted state difference of liquid crystal molecule forms a plurality of domain in the same area.
Fig. 7 is an embodiment of the invention synoptic diagram 1;
In ultraviolet alignment technique, ultraviolet emission device shines ultraviolet ray on the MASK by light path, the present invention is mapped to the front of mask at ultraviolet lighting, and the light path exit adds one group of prismatic lens again, makes light path respectively with same direction, but a plurality of angle outgoing, angular range comprises 90 degree between 88 degree-90 degree, it also can be multiple that the angle of outgoing can be two kinds, can apart from one another by, also can have only two.To reach the purpose of mixed orientation.
Fig. 8 is an embodiment of the invention synoptic diagram 2;
When ultraviolet ray with the angular illumination on the direction to mask, ultraviolet light can shine by the breach on the mask on the substrate, the present invention above the mask figure v notch v, middle or below add prism, make ultraviolet light when mask goes up outgoing, on the same direction angles different more than 2 kinds can arranged.
Fig. 9 is an embodiment of the invention synoptic diagram 3;
Use the mask more than 2 or 2 that the alignment film on the glass substrate is carried out the light orientation, the gap width on every mask is no more than 1/4 sub-pixel, and in irradiation process, breach can not overlap each other.When each irradiation, it is slightly different to make UV light advance the angle of mask breach, reaches the effect of mixing angle orientation.The benefit of doing like this is need not add prism or orientation device at mask or UV light exit, but needs to increase the irradiation number of times of UV light.
Among the figure:
1a: the first substrate 1b: second substrate
2a: the first substrate alignment film 2b: the second substrate alignment film
3: liquid crystal layer 4: mask plate Mask
5: prism group 6:Mask Board position prism
7a: the side chain 7b that is parallel to incident light: perpendicular to the side chain of incident light
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
A kind of alignment method that mixes vertical light orientation liquid crystal indicator, it may further comprise the steps:
(a), on first substrate and second substrate, be coated with the first substrate alignment film and the second substrate alignment film respectively;
(b), the ultraviolet light that adopts different angles is simultaneously to a plurality of area illumination of at least one alignment film, carries out orientation, the side chain of alignment film forms and the corresponding angle of UV-irradiation angle in each zone.
The angular range of UV-irradiation of the present invention is 88 degree-90 degree, and the side chain angular range of alignment film is 88 degree-90 degree.
The scope of ultraviolet light of the present invention is 100-200nm, and exposure is 10-200mJ/ cm2, and the time is 10-50sec.
A plurality of zones on the alignment film of the present invention are strip or bulk, interval or continuous.
Among the present invention, carry out the multi-angle orientation of two alignment films simultaneously or only on an alignment film, carry out the multi-angle orientation.
The generation device of the ultraviolet light of different angles of the present invention comprises mask plate mask and prism group, and mask is provided with a plurality of breach that are used for logical light, and mask places the top of alignment film, and the prism group places the both sides up and down of mask.
The production method of the ultraviolet light of different angles of the present invention is: UV-irradiation prism group, after the incident direction of change light produces the ultraviolet light of different angles, inject alignment film by the breach on the mask.
The prismatic refraction rate of prism group of the present invention is greater than 1.2.
Embodiment one:
Among the embodiment 1, the design of light path is not limited to the use prism, can use other modes such as LC lens; If use voltage controlled modes such as LC lens, also can utilize the advantage of device that light path is finely tuned in actual utilization; The refractive index of prism is the material greater than 1.2, is confined to SiO2 incessantly.The angle of prism is not limited to diagram, also can adopt other angles, reaches optically focused and effect preferably along separate routes;
The process of beam split is not confined to the end of light path, can use mode beam split such as fly-eye lens yet in light path, and then respectively light path be gathered on the mask.
Embodiment two:
Among the embodiment 2, the position of prism can be above the Mask breach around the Mask, also can below, also can be at the gap position of mask; The refractive index of prism is the material greater than 1.2, is confined to SiO2 incessantly; The mode of beam split is not limited to prism, also can adopt other modes; The angle of prism is not limited to diagram, also can adopt other angles, reaches optically focused and effect preferably along separate routes.
Embodiment three:
Among the embodiment 3, the breach size of mask is no more than 1/4 sub-pixel; Each light-struck angle of UV is slightly different, and scope is between the 87-90 degree; Each UV rayed can be under same light source reirradiation, also can Different Light, in the moving process of substrate, add new light source irradiation.
The part that the present invention does not relate to prior art that maybe can adopt all same as the prior art is realized.
Claims (8)
1. alignment method that mixes vertical light orientation liquid crystal indicator, it is characterized in that: it may further comprise the steps:
(a), on first substrate and second substrate, be coated with the first substrate alignment film and the second substrate alignment film respectively;
(b), the ultraviolet light that adopts different angles is simultaneously to a plurality of area illumination of at least one alignment film, carries out orientation, the side chain of alignment film forms and the corresponding angle of UV-irradiation angle in each zone.
2. the alignment method of mixing vertical light orientation liquid crystal indicator according to claim 1, the angular range that it is characterized in that described UV-irradiation are 88 degree-90 degree, and the side chain angular range of alignment film is 88 degree-90 degree.
3. the alignment method of mixing vertical light orientation liquid crystal indicator according to claim 1, the scope that it is characterized in that described ultraviolet light is 100-200nm, and exposure is 10-200mJ/ cm2, and the time is 10-50sec.
4. the alignment method of mixing vertical light orientation liquid crystal indicator according to claim 1 is characterized in that a plurality of zones on the described alignment film are strip or bulk, interval or continuous.
5. the alignment method of mixing vertical light orientation liquid crystal indicator according to claim 1 is characterized in that carrying out simultaneously the multi-angle orientation of two alignment films or only carry out the multi-angle orientation on an alignment film.
6. the alignment method of mixing vertical light orientation liquid crystal indicator according to claim 1, the generation device that it is characterized in that the ultraviolet light of described different angles comprises mask plate mask and prism group, mask is provided with a plurality of breach that are used for logical light, mask places the top of alignment film, and the prism group places the both sides up and down of mask.
7. the alignment method of mixing vertical light orientation liquid crystal indicator according to claim 1 is characterized in that described
The production method of the ultraviolet light of different angles is: UV-irradiation prism group, after the incident direction of change light produces the ultraviolet light of different angles, inject alignment film by the breach on the mask.
8. the alignment method of mixing vertical light orientation liquid crystal indicator according to claim 6, the prismatic refraction rate that it is characterized in that described prism group is greater than 1.2.
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| CN 201110200964 CN102221758A (en) | 2011-07-18 | 2011-07-18 | Alignment method for hybrid vertical photoalignment liquid crystal display device |
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| CN 201110200964 CN102221758A (en) | 2011-07-18 | 2011-07-18 | Alignment method for hybrid vertical photoalignment liquid crystal display device |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102436098A (en) * | 2011-12-21 | 2012-05-02 | 深圳市华星光电技术有限公司 | Aligning equipment and method for polymer-stabilized vertically-aligned liquid crystal panel |
| CN103487986A (en) * | 2013-09-30 | 2014-01-01 | 南京中电熊猫液晶显示科技有限公司 | Liquid crystal displayer with sub-pixel blending display mode |
| WO2014029117A1 (en) * | 2012-08-20 | 2014-02-27 | 深圳市华星光电技术有限公司 | Liquid crystal alignment device |
| CN104714338A (en) * | 2013-12-16 | 2015-06-17 | 群创光电股份有限公司 | Liquid crystal display panel |
| CN104932147A (en) * | 2015-06-19 | 2015-09-23 | 深圳市华星光电技术有限公司 | Manufacturing table and method for liquid crystal display panel |
| CN105259710A (en) * | 2015-11-12 | 2016-01-20 | 深圳市华星光电技术有限公司 | Optical alignment photomask |
| CN105527759A (en) * | 2016-03-09 | 2016-04-27 | 京东方科技集团股份有限公司 | Liquid crystal alignment method, pixel structure, display panel and display device |
| CN106773335A (en) * | 2016-12-30 | 2017-05-31 | 深圳市华星光电技术有限公司 | A kind of liquid crystal display panel |
| CN107908045A (en) * | 2017-11-22 | 2018-04-13 | 深圳市华星光电半导体显示技术有限公司 | The preparation method and preparation facilities of a kind of alignment film |
| US11099436B2 (en) | 2017-11-22 | 2021-08-24 | Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Method and apparatus for manufacturing an alignment film |
| CN113671757A (en) * | 2021-08-31 | 2021-11-19 | 深圳市华星光电半导体显示技术有限公司 | Liquid crystal display panel and manufacturing method thereof |
| CN113777837A (en) * | 2021-09-29 | 2021-12-10 | 业成科技（成都）有限公司 | Liquid crystal display panel, preparation method thereof and display screen |
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| CN101676784A (en) * | 2008-08-06 | 2010-03-24 | 三星电子株式会社 | Alignment substrate, method of manufacturing the alignment substrate |
| WO2010137402A1 (en) * | 2009-05-29 | 2010-12-02 | シャープ株式会社 | Optical alignment processing method, mask for optical alignment processing and method for manufacturing an aligned film |
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| CN1184951A (en) * | 1996-11-29 | 1998-06-17 | 三星电管株式会社 | Aligning method for alignment layer of LCD |
| CN101676784A (en) * | 2008-08-06 | 2010-03-24 | 三星电子株式会社 | Alignment substrate, method of manufacturing the alignment substrate |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102436098A (en) * | 2011-12-21 | 2012-05-02 | 深圳市华星光电技术有限公司 | Aligning equipment and method for polymer-stabilized vertically-aligned liquid crystal panel |
| WO2014029117A1 (en) * | 2012-08-20 | 2014-02-27 | 深圳市华星光电技术有限公司 | Liquid crystal alignment device |
| CN103487986A (en) * | 2013-09-30 | 2014-01-01 | 南京中电熊猫液晶显示科技有限公司 | Liquid crystal displayer with sub-pixel blending display mode |
| CN104714338A (en) * | 2013-12-16 | 2015-06-17 | 群创光电股份有限公司 | Liquid crystal display panel |
| CN104932147A (en) * | 2015-06-19 | 2015-09-23 | 深圳市华星光电技术有限公司 | Manufacturing table and method for liquid crystal display panel |
| CN105259710A (en) * | 2015-11-12 | 2016-01-20 | 深圳市华星光电技术有限公司 | Optical alignment photomask |
| CN105259710B (en) * | 2015-11-12 | 2018-09-14 | 深圳市华星光电技术有限公司 | Light orientation light shield |
| WO2017152497A1 (en) * | 2016-03-09 | 2017-09-14 | 京东方科技集团股份有限公司 | Liquid crystal alignment method, and pixel structure, display panel, and display apparatus |
| US10042208B2 (en) | 2016-03-09 | 2018-08-07 | Boe Technology Group Co., Ltd. | Liquid crystal alignment method, pixel structure, display panel and display device |
| CN105527759A (en) * | 2016-03-09 | 2016-04-27 | 京东方科技集团股份有限公司 | Liquid crystal alignment method, pixel structure, display panel and display device |
| CN105527759B (en) * | 2016-03-09 | 2018-10-30 | 京东方科技集团股份有限公司 | LCD alignment method, dot structure, display panel and display device |
| CN106773335A (en) * | 2016-12-30 | 2017-05-31 | 深圳市华星光电技术有限公司 | A kind of liquid crystal display panel |
| CN107908045A (en) * | 2017-11-22 | 2018-04-13 | 深圳市华星光电半导体显示技术有限公司 | The preparation method and preparation facilities of a kind of alignment film |
| US11099436B2 (en) | 2017-11-22 | 2021-08-24 | Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Method and apparatus for manufacturing an alignment film |
| CN113671757A (en) * | 2021-08-31 | 2021-11-19 | 深圳市华星光电半导体显示技术有限公司 | Liquid crystal display panel and manufacturing method thereof |
| CN113671757B (en) * | 2021-08-31 | 2024-02-02 | 深圳市华星光电半导体显示技术有限公司 | Liquid crystal display panel and manufacturing method thereof |
| CN113777837A (en) * | 2021-09-29 | 2021-12-10 | 业成科技（成都）有限公司 | Liquid crystal display panel, preparation method thereof and display screen |
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Application publication date: 20111019 |